<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src='./vue.js'></script>
</head>
<body>
  <div id="app">{{content}}</div>

  <script>
    // let dom=document.getElementById('app')
    // dom.innerHTML='hello world'
    let app=new Vue({
      el:'#app',
      data:{
        content:'hello world!!!!'
      }
    })
    setTimeout(()=>{
      app.$data.content='hello edison'
    },2000)
  </script>
</body>

</html>